Hoarding Broodlord + Nexus of Fate + Teleportation Circle

Hoarding Broodlord

Nexus of Fate

Teleportation Circle

How it works

1. At the beginning of your end step, Teleportation Circle triggers, blinking Hoarding Broodlord.
2. When Hoarding Broodlord enters the battlefield, it triggers, searching your library for Nexus of Fate if it's in your library, and exiling it.
3. Cast Nexus of Fate either from your hand or from exile by paying 5, causing you to take an extra turn after this one and shuffle Nexus of Fate into your library.
4. Repeat each turn.